Not sure where to post this, but I assumed electrical was the closest fit. My lumbar support on drivers side doesn't work. Both top and bottom. Won't inflate or deflate, currently stuck inflated. Any "quick" fixes or things I can check? If I bring it to the dealer I suspect another 3 week fix? PLEASE HELP!

If you can follow it, here's the diagnostic document. Be ure to check your fuses and so forth. Is there anything else that is not working?

Document ID# 1247159



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Lumbar Support Inoperative
Diagnostic Aids
The lumbar pump and control module are separate units that are attached to each other by a wire harness and a hose. They are serviced as an assembly.

Step
Action
Yes
No

Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics

Connector End View Reference: Power Seat Systems Connector End Views

1
Did you review the lumbar Support Description and Operation and perform the necessary inspections?
Go to Step 2
Go to Symptoms - Seats

2
Attempt to inflate and deflate the upper and lower lumbar support bladders.

Does the lumbar support system operate as described in the system description and operation?
Go to Testing for Intermittent and Poor Connections in Wiring Systems
Go to Step 3

3
Is the lumbar pump motor always ON?
Go to Step 8
Go to Step 4

4
Are all of the lumbar support functions inoperative?
Go to Step 9
Go to Step 5

5
Press the lumbar INFLATE switch for the inoperative lumbar support function.

Does the lumbar pump motor run?
Go to Step 6
Go to Step 12

6
Does the lumbar bladder inflate and stay inflated?
Go to Step 7
Go to Step 13

7
Disconnect the lumbar pump/control module assembly.
Probe the appropriate lumbar deflate control circuit of the lumbar control module with a test lamp that is connected to a good ground.
Press the appropriate lumbar DEFLATE switch.
Does the test lamp Illuminate?
Go to Step 17
Go to Step 14

8
Disconnect the lumbar pump/control module assembly.
Probe the upper and lower lumbar inflate control circuits of the lumbar control module with a test lamp that is connected to a good ground.
Does the test lamp Illuminate for either circuit?
Go to Step 18
Go to Step 21

9
Disconnect the lumbar pump/control module assembly.
Probe the battery positive voltage circuit of the lumbar control module with a test lamp that is connected to a good ground.
Does the test lamp illuminate?
Go to Step 10
Go to Step 24

10
Connect a test lamp between the battery positive voltage circuit of the lumbar control module and the ground circuit of the lumbar control module.

Does the test lamp illuminate?
Go to Step 11
Go to Step 25

11
Probe one of the lumbar control circuits of the lumbar control module with a test lamp that is connected to a good ground.
Press the appropriate lumbar switch.
Does the test lamp illuminate?
Go to Step 20
Go to Step 23

12
Disconnect the lumbar pump/control module assembly.
Probe the inoperative lumbar function inflate control circuit of the lumbar control module with a test lamp that is connected to a good ground.
Press the appropriate lumbar INFLATE switch.
Does the test lamp illuminate?
Go to Step 17
Go to Step 15

13
Disconnect the lumbar pump/control module assembly.
Probe the inoperative lumbar function deflate control circuit of the lumbar control module with a test lamp that is connected to a good ground.
Does the test lamp illuminate?
Go to Step 19
Go to Step 17

14
Test the deflate control circuit of the inoperative lumbar function for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 22

15
Test the inflate control circuit of the inoperative lumbar function for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 16

16
Test the battery positive voltage circuit of the lumbar switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 22

17
Test the battery positive voltage circuit of the lumbar pump/control module assembly for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 20

18
Test the appropriate lumbar inflate control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 22

19
Test the appropriate lumbar deflate control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 20

20
Perform a mechanical inspection of the lumbar pump/control module assembly and bladders for air leaks, pinched air lines, and a blocked exhaust port. Refer to Lumbar Bladder Replacement .

Did you find and correct the condition?
Go to Step 28
Go to Step 21

21
Inspect for poor connections at the harness connector of the lumbar pump/control module assembly. Refer to Testing for Intermittent and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 26

22
Inspect for poor connections at the harness connector of the lumbar switch. Refer to Testing for Intermittent and Poor Connections and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?
Go to Step 28
Go to Step 27

23
Repair the open in the battery positive voltage circuit of the lumbar switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?
Go to Step 28
--

24
Repair the short to ground or open in the battery positive voltage circuit of the lumbar pump/control module assembly. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?
Go to Step 28
--

25
Repair the high resistance or open in the ground circuit of the lumbar pump/control module assembly. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?
Go to Step 28
--

26
Replace the lumbar pump/control module assembly. Refer to Lumbar Pump Replacement .

Did you complete the replacement?
Go to Step 28
--

27
Replace the lumbar switch. Refer to Lumbar Switch Replacement .

Did you complete the replacement?
Go to Step 28
--

28
Operate the system in order to verify the repair.

Did you correct the condition?
System OK
Go to Step 2



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Document ID# 1247159
2004 Cadillac XLR
1G6YV34A345604274

PS Both the drivers seat and passengers seat share the same fuse for the lumbar support - does the passenger's seat lumbar work? If not, it may be a fuse. if it's only the driver's side, it may be a disconnected connector. Try to move the seat UP all the way (height and to the front), thn look or feel under it (from the rear) for anything that might be disconnected. The connectors only go in one way and are all unique, so don't worry about connecting the wrong thing.

PPS Be careful! You have an airbag connector as well as the seat belt pretensioner connectors under there! They have special safety plugs that are difficult to remove without first removing their safety keys, so don't futz around too much under there!

Good luck!